访问窗口历史对象中的 URL
有没有办法在 Safari 中随机访问 Javascript 的 History 对象中的 URL？我正在编写一个扩展，我需要在特定格式的页面请求中捕获上一页的 URL。据我所知，History 对象定义在浏览器中是非标准的。 Safari 似乎只公开其 length 属性和在历史记录中实际移动的标准方法。当其他实现公开 current、previous 和 next 属性时，我看不到任何内容告诉我 Safari 会做同样的事情。
我也尝试过 document.referrer，但在这种情况下似乎没有被填充。
我只需要在给定页面上显示以前访问过的 URL。还有其他方法可以访问该网址吗？
谢谢。
Is there any way to randomly access the URLs in Javascript's History object in Safari? I'm writing an extension where I need to, on a specifically-formatted page request, capture the URL of the previous page. From what I've been able to find, the History object definition is non-standard across browsers. Safari only seems to expose its length property and the standard methods that actually move within the history. Where other implementations expose current, previous and next properties, I can't see anything that tells me Safari does the same.
I've also tried document.referrer, but that doesn't appear to get populated in this case.
I just need to display the previously accessed URL on a given page. Is there any other way to access that URL?
Thanks.
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你不能真正做到这一点，至少不能以任何白帽方式做到这一点。通过设计。您可以让用户前后移动，但看不到 URL。
不那么严谨的编剧当然会将此视为一种挑战。我相信他们最接近的是动态地将一堆已知的比较链接写入页面，然后检查它们以查看它们是否以“已访问”颜色状态显示。也许，如果您在一个封闭且可预测的环境（内部网应用程序？）中工作，并且具有一组已知的 URL，那么这可能是您的有效方法。话又说回来，在这样的环境中，您可以通过会话管理在服务器端处理此问题。
You can't really do this, at least in any white-hat way. By design. You can step the user backward and forward, but you can't see the URLs.
Less scrupulous script-writers have of course taken this as a challenge. I believe the closest they've come is to dynamically write a bunch of known comparison links to the page, and then inspect them to see if they're showing in the "visited" color state. Perhaps if you're working in a closed and predictable environment (an intranet app?), with a known set of URLs, this might be a valid approach for you. Then again, in such an environment you could deal with this on the server side with session management.